BOOKS
https://libgen.io/
https://gen.lib.rus.ee/
https://b-ok.org/
https://en.bookfi.net/
https://www.scribd.com/
https://www.avaxhome.co/
https://ebook3000.com/
https://www.freebookspot.es/
RESEACH ARTICLES
https://gen.lib.rus.ec/scimag/
https://libgen.io/scimag/index.php
https://iranpaper.ir/
https://reseachgate.net/
https://scholar.google.com.vn/
https://ourglocal.com/journal/
https://journalseek.net/
CONFERENCES ALERTS
https://www.ourglocal.com/
https://www.wikicfp.com/cfp/
https://conferencealerts.com/
https://www.allconferencealerts.com/
https://internationalconferencealerts.com
ARTICLE EDITING
https://www.mendeley.com
https://www.typeset.io/
https://endnote.com/
https://www.grammarly.com/
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